题目:
England is the largest of the four countries and _______it is divided roughly into three zones. [ ]
A. in convenience
B. with convenience
C. for convenience
D. at convenience
答案:
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(1)蓝 强 Cu+2AgNO3===Cu(NO3)2+2Ag(2)锌与盐酸反应产生氢气比铁快(3)Fe CuSO4 Cu HCl(合理答案均可)(1)铜能与硝酸银反应生成硝酸铜和银,硝酸铜的溶液为蓝色,故填:蓝,强,C...